Understanding irrational numbers

REVIEW: Check the definition and the correct answer of square root and square root of 81

• 5 and a whole number

• 9

• 40.5

• A number that can be multiplied twice

• A number that can be divided by two whole numbers equally

Simplify the expression:
√30 

• √30
• 3√5
• 6√5
• 3√6

How do you feel about SQUARE ROOTS?

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√16 is equal to-

• -16
• 4
• 256
• 8

 $\sqrt{36\ }\ =\ ?$  

•  $\pm4$  
  

•  $\pm6$  

•  $\pm18$  
  

•  $\pm12$  
  

 $\sqrt{289}$  

• 18

• 19

• 17

• 28

 $\sqrt{36x^2y^6}$  

•  $18xy^3$  

•  $6x^2y^6$  

•  $6xy^3$  

•  $3x^2y^6$  

Answer explanation

Use the calculator and see which answer choice best matches.